Process of removing discoloring-deposits from masonry structures



DOLARD PROCESS OF REMOVING DISGOLORING-D CADIAUX, 0F LOWELL,IVIASSAGHUSETTS.

EPOSITS FROM MASONRY STRUCTURES.

Specification of No Drawing.

To all whom it may concern:

Be it known that I, DOLARD CADIAUX, a citizen of the United States,residing at Lowell, in the county. of Middlesex and State ofMassachusetts, have invented. certain new and useful Improvements inProcesses of Removing 'Discolor'ing-Deposits from Masonry Structures, ofwhich the following is a specification.

This invention relates to the process of removing and preventingrecurrence of the white stain or deposits ordinarily resulting from theexposure of natural and artificial stone in building structures toatmospheric. and other dampness.

The invention has for its object to provide a convenient and economicalprocess involving the application of muriatic acid to the surface to betreated whereby the same is thoroughly cleansed of discoloring depositsand subsequently applying to the surfacea compound consisting of oils bywhich the stone or brick is rendered impervious to dampness therebypreventing the recurrence of discoloration.

In carrying out the process I apply, by means of a brush or swabmuriatic acid to the surface of the stone or brick by which the latteris thoroughly cleansed of the discoloring deposits restoring the stoneor brick to its original color and, in the case of the treatment ofpolished stone or brick, to its original luster.

Subsequent to the cleaning process the surface is gone over with amixture of oil of citronella, oil of sassafras and glycerin in theproportions of one-half pint of oil of citronella and one-half pint ofoil of sassafras to a wine glass of glycerin whereby to Applicationfiled July 12,

Letterslatent. .Patented June F, 1921.

1919. Serial no. 310,425. permanently close the pores of the brick orstone thereby preventing the absorption of moisture and water and theconsequent discoloring deposits. The use of the oils, it will be noted,also kills any animal growths that may have developed and prevents theformation of such growth. The surface is finally gone over with a coatof pure glycerinwhich improves the appear-' ance of the work.

Having thus described my process in detail, what I desire to secureby'Letters Patent is:

l. The process of treating stone for removing discoloring depositstherefrom consisting in applying muriatic acid thereto and subsequentlyapplying a mixture of oil of citronella, oil of sassafras and glycerinto render the stone impervious to moisture and finally applying pureglycerin to the surface of the stone.

2. The process of treating stone, brick, etc, consisting in firstcleaning-the same by an application of mineral cleansing acid, theretoand second by the application of a mixture of essential oils andglycerin as will render the cleaned surface impervious to moisturewithout alteration of the natural appearance of the same.

8. The process of treating stone, brick, etc, which consists in firstcleaning the same by an application of muriatic acid, and then applyinga mixture of citronella, sassafras and lycerin in substantially equalparts and subsequently applying pure glycerin to the cleaned surface.

In testimony whereof, I afiix my signature hereto.

DQLARD CADIAUX.

